Securing important bolts for MOT

It would not be standard practice on a normal road car, but is on cars for competition use, so that a quick glance at scrutineering tells if anything is coming undone.

I do not believe it will be picked up on an MOT, but if you are worried it will then just wire it up, copper would do, it is an indicator rather than a holding device, so the tensile strength is irrelevant.

You can buy the right wire from many places online for three quid upward.

We used to use sheath wire from armoured cable. If you have some cut about 1ft off and strip it for the wires.

of course the secondary use of it is so that a loose bolt won't drop out on the track, I had forgotten that (thirty years since my RAC licence was last renewed)

Too far put of left field for the average MoT guy. TBH, it's fairly rare to find renewed loctite on brake bolts and, done up to spec, they don't seem prone to coming loose.

If you're really worried just replace the bolts. What car, OOI?

Even the most eagle-eyed tester is only going to put it down as an advisory. I can't see anything in the regs that would require the bolts to be lock- wired, even if it was done from the factory.

Chris

Jag XJS 5.3l V12 (HE variant.) But it's not been modified for competition use at all.

I do have some and it did cross my mind! But it's extra hassle and since the general view here is not to worry about it, I'll just do 'em up to

I watched a lovely video on YouTube with Raymond Baxter interviewing the two lead design engineers of the V12. It must have been a late 60s film but they're even talking about EGR & emissions which I always assumed didn't become important until the late 70s/80s.

the American market was decades ahead of us in emission regulations, so that would have been an important aim for a new engine, which has to be made for quite a few years to justify development costs